Medical stand with counter balance device using gas cylinder

Abstract

The present invention provides a medical stand comprising: a fixed frame; a movable frame attached to the fixed frame so as to be movable in a vertical direction; a driving unit installed inside the fixed frame and located at the lower part of the fixed frame; a circulation member connected to the driving unit and configured to apply the driving force of the driving unit to the movable frame; a gas cylinder installed inside the fixed frame and located at the upper part of the fixed frame; a wire connecting the gas cylinder and the movable frame; and a plurality of pulleys located inside the fixed frame and changing the path of the wire.

Description

Technology Field

[0001] The present invention relates to a medical stand, and more specifically, to a stand for raising and lowering medical devices such as X-ray imaging devices or X-ray detectors, wherein the weight of a heavy medical device is effectively balanced through a wire system using a gas cylinder and a plurality of pulleys, thereby enabling stable lifting operation even with a low-capacity drive motor. Background Technology

[0002] Generally, X-ray imaging devices used in medical institutions such as hospitals are devices that diagnose internal diseases by detecting X-rays emitted from an X-ray tube as they pass through the patient's body using a detector. The X-ray tube or detector of such devices is mounted on a medical stand and moves up and down according to the patient's examination area to perform imaging.

[0003] Recently, as the performance of X-ray detectors has improved, the size and weight of the detectors have increased, leading to situations where heavy equipment weighing between 150 kg and 200 kg must be mounted on a stand and lifted. In particular, in two-stage drive lifting devices, the load placed at the front is very large, so there is a problem in that a large-capacity motor and a reduction gear must be used to drive it.

[0004] The conventional method of combining weight balances and balance springs had limitations regarding the weight and size of the weights, which necessitated increasing the size of the stand or the capacity of the drive motor. Additionally, the method using weights had the disadvantages of low space efficiency and inconvenient installation and maintenance.

[0005] Therefore, there is a growing need for a new counterbalance system that can stably lift heavy medical devices even with a low-capacity motor, has high space efficiency, and ensure safety even in the event of a disconnection of the circulation member or wire. Patent Documents 1 and 2 below disclose a conventional medical stand. Prior art literature

[65535] Republic of Korea Published Patent Application No. 10-2016-0064832 (June 8, 2016) Republic of Korea Published Patent Application No. 10-2011-0138590 (December 28, 2011) The problem to be solved

[0006] The problem that the present invention aims to solve is to provide a medical stand that can effectively balance the weight of a heavy medical device through a wire system using a gas cylinder and a plurality of pulleys.

[0007] In particular, the problem that the present invention aims to solve is to provide a medical stand that can stably lift heavy medical devices weighing more than 150 kg even with a low-capacity drive motor by efficiently utilizing the restoring force of a gas cylinder through the force amplification effect of a pulley.

[0008] In addition, the problem that the present invention aims to solve is to provide a medical stand with enhanced safety that can prevent sudden falling or rising even when the wire is disconnected by independently configuring the circulating member drive system and the wire balance system.

[0009] The problems to be solved through the various embodiments of the present invention are not limited to those mentioned above, and other unmentioned problems will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0010] To solve the above problem, the technical concept of the present invention provides a medical stand comprising: a fixed frame; a movable frame attached to the fixed frame so as to be movable in a vertical direction; a driving unit installed inside the fixed frame and located at the lower part of the fixed frame; a circulation member connected to the driving unit and configured to apply the driving force of the driving unit to the movable frame; a gas cylinder installed inside the fixed frame and located at the upper part of the fixed frame; a wire connecting the gas cylinder and the movable frame; and a plurality of pulleys located inside the fixed frame and changing the path of the wire.

[0011] To solve the above problem, the technical concept of the present invention provides a medical stand comprising: a fixed frame including an upper wall, a lower wall, and a side wall adjacent to the upper and lower walls; a movable frame attached to the side wall of the fixed frame so as to be movable in a vertical direction; a driving unit installed inside the fixed frame and located on the lower wall of the frame; a circulating member connected to a rotating wheel connected to the driving unit and the upper wall of the fixed frame, configured to rotate according to the operation of the driving unit; a gas cylinder installed inside the fixed frame and including a main body fixed to the upper wall of the fixed frame and a piston configured to protrude from the main body toward the lower wall of the frame; a first pulley and a second pulley attached inside the fixed frame with a fixed height in a vertical direction; a third pulley attached to the piston of the gas cylinder and moving together with the piston of the gas cylinder; and a wire connected to the movable frame by sequentially passing through the third pulley, the second pulley, the third pulley, and the first pulley from the main body of the gas cylinder.

[0012] Specific details of other embodiments are included in the detailed description and drawings. Effects of the invention

[0013] According to embodiments of the present invention, by effectively balancing the weight of a heavy medical device through a wire system using a gas cylinder and a plurality of pulleys, a heavy medical device weighing more than 150 kg can be stably lifted even with a low-capacity drive motor, thereby reducing manufacturing costs and increasing space efficiency.

[0014] According to another embodiment of the present invention, by utilizing the force amplification effect through a pulley, a sufficient counterbalance effect can be obtained while minimizing the size of the gas cylinder, thereby reducing the overall size of the stand and saving installation space.

[0015] According to another embodiment of the present invention, by independently configuring the circulation member driving system and the wire balance system, the rapid drop or rise of the movable frame can be prevented even if either the circulation member or the wire is disconnected, thereby increasing the safety and reliability of the medical stand.

[0016] According to another embodiment of the present invention, a wire breakage can be detected and responded to early through a sensor that detects whether the wire is cut, thereby preventing accidents in advance.

[0017] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description in the claims. Brief explanation of the drawing

[0018] FIG. 1 is a schematic perspective view of a medical stand according to one embodiment of the present invention. FIG. 2 is a schematic side view of a medical stand according to one embodiment of the present invention. FIG. 3 is a side cross-sectional view schematically showing a counter-balance device of a medical stand according to one embodiment of the present invention. FIG. 4 is a cross-sectional view schematically showing the wire and circulation member of a medical stand according to one embodiment of the present invention. FIG. 5 is a cross-sectional view schematically showing the movement path of a wire of a medical stand according to one embodiment of the present invention. Specific details for implementing the invention

[0019] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Throughout the specification, the same reference numerals refer to the same components.

[0020] The embodiments described herein will be explained with reference to cross-sectional and / or plan views, which are exemplary illustrations of the invention. In the drawings, the thicknesses of the films and regions are exaggerated for effective explanation of the technical content. Accordingly, the regions illustrated in the drawings are schematic in nature, and the shapes of the regions illustrated in the drawings are intended to illustrate specific forms of regions of the device and are not intended to limit the scope of the invention.

[0021] In the various embodiments of this specification, terms such as first, second, third, etc., have been used to describe various components, but these components should not be limited by such terms. These terms are used merely to distinguish one component from another. The embodiments described and illustrated herein also include their complementary embodiments.

[0022] The terms used herein are for describing the embodiments and are not intended to limit the invention. In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. As used herein, "comprises" and / or "comprising" do not exclude the presence or addition of one or more other components, steps, actions, and / or elements to the mentioned components, steps, actions, and / or elements.

[0023] Unless otherwise defined, all terms used in this specification (including technical and scientific terms) may be used in a meaning that is commonly understood by those skilled in the art to which the present invention pertains. Furthermore, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless explicitly and specifically defined otherwise. Hereinafter, the concept of the present invention and embodiments thereof will be described in detail with reference to the drawings.

[0024] FIG. 1 is a perspective view schematically showing the overall configuration of a medical device (10) according to an embodiment of the present invention. FIG. 2 is a side view schematically showing a medical stand (100) according to an embodiment of the present invention. FIG. 3 is a side cross-sectional view schematically showing the interior of a medical stand (100) according to an embodiment of the present invention. FIG. 4 is a cross-sectional view schematically showing a wire (W) and a circulation member (C) of a medical stand (100) according to an embodiment of the present invention. FIG. 5 is a cross-sectional view schematically showing the movement path of a wire of a medical stand (100) according to an embodiment of the present invention.

[0025] Referring to FIG. 1, the medical device (10) may include a measuring device (200) and a medical stand (100). The medical device (10) is a device used to diagnose internal diseases of a patient in a medical institution such as a hospital, and can perform imaging using X-rays. The medical device (10) may be supported by the medical stand (100) so that the position of the measuring device (200) can be adjusted according to the patient's body part.

[0026] The measuring device (200) may be equipment attached to the movable frame (1200) of the medical stand (100) to perform an examination of a patient. The measuring device (200) may be composed of an X-ray tube, an X-ray detector, or a combination thereof. The X-ray tube may perform the role of generating X-rays and passing them through the patient's body, and the X-ray detector may perform the role of detecting X-rays that have passed through the patient's body and converting them into image information.

[0027] Since the measuring device (200) must be positioned at various heights depending on the patient's examination area, it can be attached to the movable frame (1200) of the medical stand (100) and moved up and down. The weight of the measuring device (200) tends to increase with the improvement of the performance of the X-ray detector, and in some embodiments, the weight of the measuring device (200) can range from 150 kg to 200 kg.

[0028] In some embodiments, the measuring device (200) may be detachably coupled to the movable frame (1200) and may be replaced with a different type of measuring device (200) depending on the type of examination or the patient's condition. The coupling of the measuring device (200) and the movable frame (1200) may be achieved through bolt fastening, a clamp method, or a quick-release mechanism.

[0029] A medical stand (100) is a device that supports a measuring device (200) and moves it up and down, and may include a fixed frame (1100) and a movable frame (1200). For example, the measuring device (200) may be attached to the movable frame (1200) of the medical stand (100) and may move together with the movement of the movable frame (1200). The medical stand (100) may include a driving unit (1300) and a gas cylinder (1400) to stably support the weight of the measuring device (200) while providing smooth lifting operation.

[0030] The medical device (10) can examine various parts of a patient's body through the lifting and lowering motion of the medical stand (100). For example, when examining the patient's chest, the measuring device (200) can be moved upward, when examining the abdomen, the measuring device (200) can be moved to the middle, and when examining the lower limb, the measuring device (200) can be moved downward.

[0031] Referring to FIGS. 2 to 5, the medical stand (100) may include a fixed frame (1100), a movable frame (1200), a driving unit (1300), a gas cylinder (1400), a plurality of pulleys (1500), a circulation member (C), and a wire (W).

[0032] The medical stand (100) can be configured to be movable by attaching a measuring device (200) to a movable frame (1200). The position of the measuring device (200) can be adjusted to match the patient's examination area according to the lifting and lowering movement of the movable frame (1200).

[0033] The fixed frame (1100) is a component that forms the main skeleton of the medical stand (100) and can be installed upright on the floor surface to support the medical device (10). The fixed frame (1100) may be a box-shaped or column-shaped structure that forms an internal space including a bottom wall, an upper wall, and side walls.

[0034] The lower wall of the fixed frame (1100) can serve as a base that supports the entire medical stand (100) by contacting the floor surface. A drive unit (1300) may be installed on the lower wall, and a space to accommodate the drive unit (1300) may be provided. In some embodiments, the lower wall may be formed in a flat shape to provide stable support. Anchor bolt holes or fixing brackets may be provided on the lower wall to fix the position of the medical stand (100).

[0035] The thickness of the lower wall can be designed to have sufficient rigidity to withstand the weight of the measuring device (200) and the dynamic load generated when the moving frame (1200) is driven. A base plate may be attached to the lower surface of the lower wall to increase the contact area with the floor surface, and the base plate can improve the stability of the medical stand (100) and distribute the pressure applied to the floor surface.

[0036] The upper wall of the fixed frame (1100) is positioned opposite the lower wall and can form the upper end of the fixed frame (1100). A gas cylinder (1400) may be attached to the upper wall, and a first pulley (1510) may be installed. The upper wall may serve to support and fix the main body (1410) of the gas cylinder (1400). In some embodiments, a bracket or fixing member for fixing the gas cylinder (1400) may be attached to the upper wall.

[0037] The thickness and rigidity of the upper wall can be designed to stably support the restoring force generated from the gas cylinder (1400). The upper wall may be formed in a flat shape, and a reinforcing rib or reinforcing plate may be additionally provided at the location where the main body (1410) of the gas cylinder (1400) is fixed to improve structural rigidity. In some embodiments, the thickness of the upper wall may be smaller than the thickness of the lower wall.

[0038] The first pulley (1510) can be rotatably installed on the lower surface of the upper wall, and sufficient space can be secured so that the wire (W) can move smoothly. The vertical space between the upper wall and the lower wall forms the internal space of the fixed frame (1100), and in this internal space, a driving unit (1300), a gas cylinder (1400), a circulation member (C), a wire (W), and a plurality of pulleys (1500) can be arranged and operated. The height of the internal space can be sufficiently secured to accommodate the operating range in which the piston (1420) of the gas cylinder (1400) fully contracts and extends, and the maximum travel distance of the moving frame (1200).

[0039] The fixed housing (1100) separates the internal space from the outside, thereby protecting the drive unit (1300), gas cylinder (1400), circulation member (C), wire (W), and multiple pulleys (1500) from external impact. In addition, the fixed housing (1100) can prevent safety accidents in which a user is injured by the drive unit (1300), gas cylinder (1400), circulation member (C), wire (W), and multiple pulleys (1500).

[0040] The side walls of the fixed frame (1100) extend vertically by connecting the lower wall and the upper wall and can form an internal space of the fixed frame (1100). The side walls may be composed of multiple pieces to form a square, hexagonal, or other polygonal cross-section. In some embodiments, the fixed frame (1100) may be formed in a square column shape and may include four side walls.

[0041] An opening may be formed in the side wall of the fixed frame (1100) to provide a space for the movable frame (1200) to move. The opening may be a slot shape that extends vertically along the side wall of the fixed frame (1100) and may have a sufficient length to allow the movable frame (1200) to move up and down over the entire height of the fixed frame (1100). The length of the opening may be determined in correspondence with the maximum range of movement of the movable frame (1200) and may extend, for example, from about 500 mm to 2000 mm from the bottom surface.

[0042] A portion of the movable frame (1200) may protrude outside the fixed frame (1100) through the opening, and another portion of the movable frame (1200) may be inserted into the internal space of the fixed frame (1100) through the opening. A measuring device (200) may be attached to the portion protruding outside through the opening, and a connecting structure of a circulating member (C) and a fixing part of a wire (W) may be provided in the portion inserted into the internal space.

[0043] The width of the opening can be formed to be slightly larger than the thickness of the movable frame (1200) so that the movable frame (1200) can move smoothly. The gap between the opening and the movable frame (1200) can be minimized to about 1 mm to 5 mm to prevent dust or foreign matter from entering the interior of the fixed frame (1100).

[0044] In some embodiments, a sealing member may be installed at the edge of the opening. The sealing member may be made of rubber, silicone, or other elastic material to seal the gap between the opening and the movable frame (1200). The sealing member may have a low coefficient of friction so as not to hinder the smooth movement of the movable frame (1200) while blocking dust, moisture, or other contaminants from entering the internal space of the fixed frame (1100).

[0045] The side wall of the fixed frame (1100) located opposite the side wall where the opening is formed may be composed of a detachable cover panel. The cover panel may be joined to other side walls of the fixed frame (1100) via bolts, screws, or a quick-release mechanism, and may be easily detached when necessary. Through the detachable structure of the cover panel, access to the drive unit (1300), gas cylinder (1400), circulation member (C), wire (W), and multiple pulleys (1500) installed in the internal space of the fixed frame (1100) may be facilitated.

[0046] In some embodiments, the fixed frame (1100) is made of aluminum alloy, steel, or other high-strength metal material so as to reliably support the weight of the measuring device (200) and the load generated during operation. The thickness and rigidity of the fixed frame (1100) may be designed to support a load of 150 kg or more. A coating or paint for corrosion prevention may be applied to the surface of the fixed frame (1100).

[0047] The movable frame (1200) is a component that is attached to the fixed frame (1100) so as to be movable in a vertical direction, and can perform the role of directly supporting the measuring device (200). The movable frame (1200) may have a structure in which a part protrudes outside the fixed frame (1100) and a part is inserted into the internal space of the fixed frame (1100).

[0048] A portion protruding outward from the movable frame (1200) may form a mounting portion to which a measuring device (200) is attached. The mounting portion may be provided with a bracket, a bolt connection structure, or a quick-release mechanism for fixing the measuring device (200). The mounting portion may be formed in a flat plate shape, an L-shape, or a bracket shape to stably support the measuring device (200). The size and shape of the mounting portion may be designed in various ways depending on the type of measuring device (200).

[0049] The part connected to the internal space of the fixed frame (1100) of the movable frame (1200) is connected to the circulating member (C) and the wire (W) to receive driving force and balance restoring force. In this part, a connecting part to which the connecting structure of the circulating member (C) can be attached and a fixing part to which the other end of the wire (W) can be fixed may be formed. The connecting part and the fixing part may have sufficient strength to effectively distribute the force transmitted from the circulating member (C) and the wire (W).

[0050] In some embodiments, the tensile strength of the connecting part and the fixing part may be 300 MPa or more. The connecting part and the fixing part may be integrally formed with the same material as the main body of the movable frame (1200), and in other embodiments, they may be made of a different material from the main body of the movable frame (1200), such as high-strength steel, titanium alloy, or reinforced aluminum alloy, and attached by bolt, welding, or rivet joining.

[0051] When the connecting and fixing parts are manufactured from separate high-strength materials, the strength of the load-concentrating areas can be selectively improved, thereby ensuring the necessary structural stability without increasing the overall weight.

[0052] The movable frame (1200) may have a structure that connects the outside and the inside through an opening formed in the side wall of the fixed frame (1100). The portion of the movable frame (1200) through the opening has a thickness corresponding to the width of the opening and can be precisely machined so that no excessive gap occurs. A sealing member may be installed in the gap between the opening and the movable frame (1200) to prevent the intrusion of dust or foreign matter.

[0053] In some embodiments, the movable frame (1200) may move along guide rails installed on the side walls of the fixed frame (1100). Guide rails may be positioned on both sides of the movable frame (1200) to guide the movable frame (1200) so that it moves only in the vertical direction and does not sway left or right. The movable frame (1200) may be equipped with guide wheels or sliding blocks that engage with the guide rails to enable smooth movement while minimizing friction. The guide wheels may have built-in bearings to provide smooth rotation.

[0054] The shape of the movable frame (1200) can be designed in various ways depending on the type and size of the measuring device (200). In some embodiments, the movable frame (1200) may be formed as a single flat plate structure, and in other embodiments, it may be formed as a frame structure in which multiple members are combined. The material of the movable frame (1200), like the fixed frame (1100), may be made of aluminum alloy, steel, or other high-strength material to stably support the weight of the measuring device (200).

[0055] The range in which the moving frame (1200) moves along the fixed frame (1100) can be varied depending on the patient's height and the area being examined. In some embodiments, the range of movement of the moving frame (1200) may be from a minimum height of about 500 mm to a maximum height of about 2000 mm from the floor surface, which may provide a range suitable for most patient examinations.

[0056] The driving unit (1300) is a component that provides driving force to raise and lower the moving frame (1200) and can be installed on the lower wall of the fixed frame (1100).

[0057] In some embodiments, the drive unit (1300) may include a motor. The motor of the drive unit (1300) may convert electrical energy into rotational kinetic energy to provide power to circulate (rotate) the circulating member (C). For example, the motor may be an AC motor, a DC motor, a gear motor, or a servo motor.

[0058] The motor of the drive unit (1300) may have a variable speed control function to precisely control the lifting speed and position of the moving frame (1200). In some embodiments, the motor may be composed of a low-capacity motor, and the heavy measuring device (200) can be efficiently driven by the counter-balance effect of the gas cylinder (1400) and a plurality of pulleys (1500).

[0059] In some embodiments, the drive unit (1300) may include a reduction gear. The reduction gear of the drive unit (1300) can convert the high-speed rotation of the motor into low-speed, high-torque operation to provide stable lifting operation. The reduction gear may be configured as a worm gear, planetary gear, or harmonic drive, and the reduction ratio may be determined according to the required speed and load of the moving frame (1200). The reduction gear has a reverse drive prevention function so that the moving frame (1200) does not fall due to its own weight even when the power is cut off. For example, the drive unit (1300) and the reduction gear may be collectively referred to as a gear motor.

[0060] In some embodiments, the drive unit (1300) may include a lower rotating wheel (1310). In some embodiments, the lower rotating wheel (1310) may be a sprocket or a pulley, and may be a sprocket if the circulating member (C) is a chain, and a pulley if it is a belt.

[0061] The lower rotating wheel (1310) may be positioned adjacent to the lower wall of the fixed frame (1100) and may be attached to a reduction gear to receive driving force from the motor and rotate. The lower rotating wheel (1310) may be directly coupled to the output shaft of the reduction gear or connected via a coupling, and may transmit high-torque low-speed rotational force transmitted from the reduction gear to the circulating member (C).

[0062] The upper rotating wheel (1320) may be positioned on the upper wall of the fixed frame (1100) and may be rotatably installed. In some embodiments, the upper rotating wheel (1320) may be a wheel of the same type as the lower rotating wheel (1310). For example, if the lower rotating wheel is a sprocket, the upper rotating wheel (1310) may be a sprocket.

[0063] The lower rotating wheel (1310) and the upper rotating wheel (1320) are spaced apart from each other in a vertical direction, and the circulation member (C) can form a continuous closed loop across the lower rotating wheel (1310) and the upper rotating wheel (1320).

[0064] The circulation member (C) can receive rotational force by engaging with the teeth of the lower rotation wheel (1310) and the upper rotation wheel (1320), and when the lower rotation wheel (1310) rotates, the circulation member (C) can rotate along the teeth of the rotation wheel and rotate the upper rotation wheel (1320). For example, the lower rotation wheel (1310) may be a driving rotation wheel, and the upper rotation wheel (1320) may be a driven rotation wheel.

[0065] The circulation member (C) serves as a power transmission means for transmitting the driving force of the drive unit (1300) to the moving frame (1200), and can be installed in the form of a stepless rail between the lower rotating wheel (1310) and the upper rotating wheel (1320). The circulation member (C) can be made of a metal chain, a timing belt, or a reinforced rubber belt, and can have high tensile strength and durability.

[0066] A connecting structure may be attached to the circulation member (C) and combined with the movable frame (1200). The connecting structure may be fixed to a part of the circulation member (C) to convert the rotational motion of the circulation member (C) into the linear motion of the movable frame (1200).

[0067] The circulation member (C) is configured in a closed loop form connecting the lower rotation wheel (1310) and the upper rotation wheel (1320), allowing the stepless rail to rotate clockwise or counterclockwise. When the lower rotation wheel (1310) rotates clockwise, the part of the circulation member (C) to which the connecting structure is attached rises vertically as the stepless rail rotates, thereby moving the movable frame (1200) upward; and when the lower rotation wheel (1310) rotates counterclockwise, the connecting structure descends as the stepless rail rotates in the opposite direction, thereby moving the movable frame (1200) downward.

[0068] The connecting structure can be fixed to the circulation member (C) by bolting, welding, or clamping, and can be connected to the movable frame (1200) by pin connection or bracket connection. The strength of the connecting structure can be designed to safely support the entire load of the movable frame (1200), including the weight of the measuring device (200).

[0069] In some embodiments, the circulation members (C) may be positioned on each side of the fixed frame (1100). That is, independent circulation members (C) may be installed on the left and right sides of the fixed frame (1100) to drive the movable frame (1200) simultaneously from both sides. A connecting structure may be attached to each circulation member (C) to be coupled to each side of the movable frame (1200), thereby maintaining the horizontal level of the movable frame (1200) and preventing tilting due to uneven load.

[0070] The circulation members (C) positioned on both sides can be synchronized and operated by a single drive unit (1300), thereby allowing the movable frame (1200) to move stably while maintaining a horizontal position. The two-sided circulation member system provides a load distribution effect, allowing it to support a greater load compared to the single circulation member system, and even if one circulation member (C) is damaged, the other circulation member (C) can partially support the movable frame (1200), thereby improving safety.

[0071] The tension of the circulation member (C) can be properly maintained by a tension adjustment device, which can prevent sagging or detachment of the circulation member (C). The tension adjustment device can adjust the tension of the circulation member (C) by finely adjusting the position of at least one of the upper rotating wheel (1320) or the lower rotating wheel (1310). Proper tension can extend the lifespan of the circulation member (C) and minimize noise and vibration.

[0072] A gas cylinder (1400) is a component that provides a restoring force to balance the weight of a movable frame (1200) and can be attached to the upper wall of a fixed frame (1100). The gas cylinder (1400) may include a main body (1410) and a piston (1420) and may contain compressed nitrogen gas or air inside to generate an elastic restoring force.

[0073] The main body (1410) of the gas cylinder (1400) is a part that is fixed to the upper wall of the fixed frame (1100) and may have a cylindrical housing shape. The main body (1410) may be fixed to the upper wall of the fixed frame (1100) by means of a bracket, flange, or bolt connection, and the fixed position may be located in the central or rear part of the fixed frame (1100). Compressed gas is sealed inside the main body (1410), and this compressed gas can generate a force that pushes the piston (1420) downward by applying continuous pressure to the piston (1420).

[0074] In some embodiments, a second pulley (1520) may be attached to the side of the main body (1410). The second pulley (1520) may be rotatably installed on the outer surface of the main body (1410) and may perform the function of changing the path of the wire (W). The installation location of the second pulley (1520) may be the top of the main body (1410) or a side adjacent to the top, and a bearing may be built in so that the wire (W) can rotate smoothly.

[0075] In some embodiments, the second pulley (1520) may be attached to a support member that supports the side of the main body (1410). The support member is fixed to the upper or side wall of the fixed frame (1100) to support the side of the main body (1410) and prevent the main body (1410) from shaking from side to side. The second pulley (1520) is rotatably installed on this support member so that it can be installed by utilizing the support member that supports the main body (1410) without a separate support structure. Through this structure, space efficiency and structural stability can be secured simultaneously.

[0076] The outer diameter of the main body (1410) may be determined according to the restoring force that the gas cylinder (1400) must generate. In some embodiments, the outer diameter of the main body (1410) may be 50 mm to 100 mm, and the length may be 300 mm to 600 mm. The main body (1410) may be made of high-strength steel or aluminum alloy to safely withstand internal pressure, and an anti-corrosion coating may be applied to the surface.

[0077] A fixing point may be provided on the bottom or side of the main body (1410) to which one end of the wire (W) can be fixed. The fixing point may be configured as an eyebolt, a fixing bracket, or a welded ring, and one end of the wire (W) can be securely fastened. One end of the wire (W) is fixed to the main body (1410) and does not move, while the other end of the wire (W) is connected to a movable frame (1200) and can move according to the movement of the movable frame (1200).

[0078] The piston (1420) of the gas cylinder (1400) is a movable part that can extend downward from the main body (1410) and protrude, and can always receive a downward pushing force from the compressed gas pressure inside the main body (1410). The piston (1420) can be installed so as to be extendable through the lower opening of the main body (1410) and can move up and down inside the main body (1410).

[0079] The piston (1420) may include a piston rod and a piston head. The piston rod may be in the shape of a cylindrical rod extending outside the main body (1410), and the piston head may be located inside the main body (1410) and directly receive the pressure of the compressed gas. The outer diameter of the piston rod is smaller than the lower opening of the main body (1410) so that it can move smoothly up and down inside the main body (1410), and an oil seal or rubber packing may be installed between the piston rod and the main body (1410) to prevent gas leakage.

[0080] In some embodiments, a third pulley (1530) may be attached to the bottom of the piston (1420). The third pulley (1530) may move up and down together with the piston (1420) and may change the path and tension of the wire (W) according to the movement of the piston (1420). The third pulley (1530) may be fixed to the bottom of the piston (1420) via a bracket and may be rotatably installed so that the wire (W) can move without friction.

[0081] The maximum extension length of the piston (1420) may correspond to the maximum rising position of the movable frame (1200), and the maximum retraction length may correspond to the maximum lowering position of the movable frame (1200). In some embodiments, the stroke (extension and retraction range) of the piston (1420) may be 500 mm to 1000 mm. The piston (1420) may be made of high-strength steel so as not to deform even with repeated extension and retraction movements.

[0082] The operating principle of the gas cylinder (1400) may be as follows. The gas cylinder (1400) generates a restoring force that always pushes the piston (1420) downward by the pressure of the internal compressed gas, and this restoring force can perform the function of supporting the movable frame (1200) upward through the wire (W).

[0083] When the moving frame (1200) descends, the driving unit (1300) pulls the moving frame (1200) down through the circulation member (C), and as the other end of the wire (W) descends, the wire (W) can apply force to the third pulley (1530). As the wire (W) is pulled by the moving frame (1200), the third pulley (1530) moves upward, and accordingly, the piston (1420) can be retracted into the main body (1410).

[0084] As the piston (1420) contracts, the compressed gas inside the main body (1410) is further compressed, increasing the pressure and the restoring force pushing the piston (1420) downward can be increased. This increased restoring force supports the weight of the moving frame (1200) and the measuring device (200) through the wire (W), thereby significantly reducing the load that the driving unit (1300) must bear.

[0085] When the moving frame (1200) rises, the driving unit (1300) pulls the moving frame (1200) up through the circulation member (C), and the other end of the wire (W) rises, causing the wire (W) to become loose. At this time, the piston (1420) extends downward from the main body (1410) by the restoring force of the gas cylinder (1400), causing the third pulley (1530) to descend, thereby lengthening the path of the wire (W) and maintaining the tension of the wire (W).

[0086] As the piston (1420) extends, the compressed gas inside the main body (1410) expands, reducing the restoring force, but still maintaining the force that pushes the piston (1420) downward, thereby allowing continuous tension to be applied to the wire (W).

[0087] Through the operating mechanism of this gas cylinder (1400), the tension of the wire (W) can always be maintained regardless of the position of the moving frame (1200), and the weight of the moving frame (1200) and the measuring device (200) can be continuously supported, thereby significantly reducing the driving force that the driving unit (1300) must generate. By combining the restoring force of the gas cylinder (1400) and the force amplification effect through the multiple pulleys (1500) described later, a heavy measuring device (200) weighing more than 150 kg can be efficiently driven even with a low-capacity motor.

[0088] In some embodiments, the restoring force of the gas cylinder (1400) may be adjustable. A gas pressure regulating valve may be installed in the main body (1410), through which the pressure of the internal compressed gas may be increased or decreased to adjust the magnitude of the restoring force. Adjustment of the restoring force may be necessary to maintain an optimal balance state when the weight of the measuring device (200) changes. For example, when a heavy X-ray detector is mounted, the gas pressure may be increased to provide a greater restoring force, and when a light X-ray tube is mounted, the gas pressure may be decreased to maintain proper balance.

[0089] In some embodiments, the gas cylinder (1400) may include a flow control valve or an orifice. The gas cylinder (1400) may include a damping function by limiting the speed at which internal gas flows through the flow control valve or orifice. The damping function may mitigate shock by limiting the contraction speed of the piston (1420) when the moving frame (1200) descends rapidly, and may prevent overshoot by limiting the extension speed of the piston (1420) when the moving frame (1200) ascends rapidly.

[0090] A plurality of pulleys (1500) can perform the function of changing the path of the wire (W) and amplifying the force. The plurality of pulleys (1500) may include a first pulley (1510), a second pulley (1520), and a third pulley (1530), and each pulley may be placed at a different location to guide the wire (W) to move along a specific path.

[0091] The first pulley (1510) is a pulley fixedly installed on the upper wall of the fixed frame (1100) and may be located at the top of the fixed frame (1100). The first pulley (1510) may be rotatably installed on the lower surface of the upper wall of the fixed frame (1100) via a bracket and may provide a path so that the wire (W) can change direction at the top of the fixed frame (1100) and descend to the movable frame (1200).

[0092] The installation location of the first pulley (1510) may be the central or front part of the fixed frame (1100) and may be aligned with the movement path of the movable frame (1200). The first pulley (1510) is responsible for the final direction change of the wire (W) so that the wire (W) can descend vertically toward the movable frame (1200). The diameter of the first pulley (1510) may be determined by considering the bending radius of the wire (W), and in some embodiments, the diameter may be 50 mm to 150 mm.

[0093] The first pulley (1510) may have a built-in bearing to minimize friction when the wire (W) moves, and a groove may be formed on the outer surface of the first pulley (1510) for the wire (W) to rest on. The groove may be formed in a V-shape or a U-shape to prevent the wire (W) from coming off the pulley. The first pulley (1510) may be made of high-strength plastic, aluminum alloy, or steel, and a wear-resistant coating may be applied to its surface.

[0094] The second pulley (1520) is a pulley attached to the main body (1410) of the gas cylinder (1400) and may be located on the top of the main body (1410) or on an outer surface adjacent to the top. The second pulley (1520) may be fixedly installed on the main body (1410) or a support member to maintain a stationary state, and may maintain a fixed position together with the main body (1410) even when the piston (1420) of the gas cylinder (1400) moves up and down.

[0095] In some embodiments, the second pulley (1520) may be rotatably installed on a bracket attached to the main body (1410). The bracket may be fixed to the outer surface of the main body (1410) by welding, bolting, or clamping, and may support the axis of rotation of the second pulley (1520). The position of the second pulley (1520) may be precisely adjusted so that the path of the wire (W) can be smoothly connected to the third pulley (1530) and the first pulley (1510).

[0096] The diameter and structure of the second pulley (1520) may be similar to that of the first pulley (1510) and may include a bearing and a wire seating groove. The first pulley (1510) and the second pulley (1520) may function as fixed pulleys that are fixed to the fixed frame (1100) or the main body (1410) and do not change position, and may primarily perform the role of changing the path of the wire (W).

[0097] The third pulley (1530) is a pulley attached to the piston (1420) of the gas cylinder (1400) and can move up and down together with the piston (1420). The third pulley (1530) can be fixed to the bottom of the piston (1420) via a bracket, and the third pulley (1530) can also move together when the piston (1420) contracts into the main body (1410) or extends outward.

[0098] The third pulley (1530) is a pulley through which the wire (W) passes twice, and it can play an important role in the path of the wire (W). The wire (W) starts from the main body (1410), and when it first passes the third pulley (1530), its path changes downward. Then, it passes through the second pulley (1520) and returns to the third pulley (1530) to pass through a second time, at which point its path changes upward. Through this double-passing structure, the pulley system can implement the principle of a compound pulley to generate a force amplification effect.

[0099] The diameter and structure of the third pulley (1530) may be similar to the first pulley (1510) and the second pulley (1520), and may have a built-in bearing to provide smooth rotation. A groove of sufficient width may be formed on the outer surface of the third pulley (1530) to allow the wire (W) to pass through twice, and the shape of the groove may be designed so that the two strands of wire (W) do not interfere with each other. In some embodiments, the groove of the third pulley (1530) is formed as a double groove structure so that the wire (W) can move along each independent groove when passing through twice.

[0100] In some embodiments, the third pulley (1530) may be fixed directly to the bottom of the piston (1420), and in other embodiments, it may be fixed via a separate bracket attached to the piston (1420). The fixing method of the third pulley (1530) may be designed to be robust so as to be stably maintained even during repeated up-and-down movement of the piston (1420). The connection between the third pulley (1530) and the piston (1420) may be made by bolt fastening, welding, or pin fastening.

[0101] In some embodiments, a plurality of pulleys (1500) may have different diameters. By differentiating the diameters of the plurality of pulleys, the force amplification ratio can be adjusted and an optimal counter-balance effect can be achieved.

[0102] The ratio of the pulley diameters can be determined by taking into account the weight of the measuring device (200), the restoring force of the gas cylinder (1400), and the capacity of the driving unit (1300). In some embodiments, the diameter of the third pulley (1530) may be 1.5 to 3 times the diameter of the first pulley (1510). By arranging the pulley diameters differently, a greater counterbalance effect can be obtained even with gas cylinders (1400) of the same size, which can contribute to the miniaturization and weight reduction of the medical stand (100).

[0103] Multiple pulleys (1500) can all be made of highly durable materials, and surface treatments can be applied to minimize wear even with the repetitive movement of the wire (W). The bearings of each pulley can maintain smooth rotation through regular lubrication, and can be replaced if the rotational resistance of the pulley increases. Since the groove portion of the pulley is particularly prone to wear, high-hardness materials or coatings may be applied.

[0104] In some embodiments, a plurality of pulleys (1500) may be configured in pairs and placed on each side of the gas cylinder (1400). That is, a set of pulleys consisting of a first pulley (1510), a second pulley (1520), and a third pulley (1530) may be symmetrically installed on the left and right sides of the gas cylinder (1400). An independent wire (W) may be connected to each set of pulleys to support each side of the movable frame (1200). The plurality of pulleys (1500) placed on both sides can evenly distribute the restoring force generated from a single gas cylinder (1400) to both sides of the movable frame (1200), thereby maintaining the horizontal level of the movable frame (1200) and preventing tilting due to uneven load. The two-sided pulley system provides a load distribution effect, allowing it to stably support a larger load compared to a single pulley system.

[0105] The arrangement of multiple pulleys (1500) and the path of the wire (W) may be as follows. One end of the wire (W) may be fixed to the main body (1410) of the gas cylinder (1400), and this fixed point may be the bottom or side of the main body (1410). The wire (W) may start from the main body (1410) and pass through the third pulley (1530) and change its path upward toward the second pulley (1520). Afterward, the wire (W) may pass through the second pulley (1520) and change its path downward toward the third pulley (1530). Afterward, it may pass through the third pulley (1530) a second time and change its path upward toward the first pulley (1510). Finally, the wire (W) can be connected to the moving frame (1200) by changing its path downward toward the moving frame (1100) while passing through the first pulley (1510).

[0106] The path of this wire (W) can be summarized as "main body (1410) fixed point → third pulley (1530) → second pulley (1520) → third pulley (1530) → first pulley (1510) → movable frame (1200)", and it may pass through the third pulley (1530) twice. Through this composite pulley system, the restoring force of the gas cylinder (1400) can be amplified and transmitted to the movable frame (1200), which can significantly reduce the burden on the drive unit (1300).

[0107] The force amplification principle of the composite pulley system may be as follows. As the third pulley (1530) acts as a movable pulley, the restoring force of the gas cylinder (1400) can be amplified and transmitted to the movable frame (1200) due to the structure in which the wire (W) passes through the third pulley (1530) twice. That is, if the gas cylinder (1400) generates a restoring force of 100 kg, a supporting force of approximately 200 kg can be provided to the movable frame (1200) through the composite pulley system. Through this force amplification effect, a sufficient counter-balance effect can be obtained while minimizing the size of the gas cylinder (1400).

[0108] The wire (W) is a tension member that transmits the restoring force of the gas cylinder (1400) to the moving frame (1200) and can be arranged along a specific path by sequentially passing through a plurality of pulleys (1500). The wire (W) can be made of high-strength steel wire, stainless steel wire, or high-strength synthetic fiber and can have high tensile strength and durability.

[0109] One end of the wire (W) can be fixed to the main body (1410) of the gas cylinder (1400). A wire fixing point may be provided in the main body (1410), and this fixing point may be located at the bottom, side, or support member supporting the main body (1410). One end of the wire (W) can be firmly fixed to the main body (1410) through an eyebolt, clamp, or swage fitting, and can stably receive the restoring force of the gas cylinder (1400).

[0110] The other end of the wire (W) can be connected to the movable frame (1200). The movable frame (1200) may be provided with a wire connection part, which may be formed at the top of the movable frame (1200) or in a part located within the internal space of the fixed frame (1100). The other end of the wire (W) can be fixed to the movable frame (1200) through an eyebolt, a clamp, or a bracket, and the tension may change according to the up and down movement of the movable frame (1200).

[0111] As previously mentioned, the path of the wire (W) can reach the moving frame (1200) by starting from the main body (1410) and sequentially passing through the third pulley (1530), the second pulley (1520), the third pulley (1530), and the first pulley (1510).

[0112] In some embodiments, the diameter of the wire (W) may be 3 mm to 10 mm, and the tensile strength may be determined by taking into account the weight of the measuring device (200) and the restoring force of the gas cylinder (1400). The tensile strength of the wire (W) may be designed to have a safety factor of at least three times the total weight of the moving frame (1200) and the measuring device (200). For example, if the weight of the measuring device (200) is 200 kg, the tensile strength of the wire (W) may be at least 600 kg.

[0113] An anti-corrosion coating or lubrication treatment may be applied to the surface of the wire (W). The anti-corrosion coating may be galvanized, nickel-plated, or epoxy-coated, and may extend the life of the wire (W) in the environment where the medical stand (100) is used. The lubrication treatment may reduce friction between the wire (W) and each of the multiple pulleys (1500), thereby minimizing wear on the wire (W) and providing smooth movement.

[0114] The tension of the wire (W) can change depending on the position of the movable frame (1200) and can always be maintained above a certain level by the restoring force of the gas cylinder (1400). The tension of the wire (W) can be maximum when the movable frame (1200) is in a lowered position, and the tension of the wire (W) can be minimum when the movable frame (1200) is in a raised position. However, due to the restoring force of the gas cylinder (1400), the wire (W) can maintain appropriate tension without becoming loose even in a minimum tension state.

[0115] In some embodiments, the wire (W) may be composed of two strands corresponding to a plurality of pulleys (1500) each positioned on both sides of the gas cylinder (1400). That is, a first wire passing through the left pulley set and a second wire passing through the right pulley set may each connect the main body (1410) and the movable frame (1200). The two strands of wire (W) can maintain the same tension to maintain the horizontal position of the movable frame (1200) and distribute the load evenly.

[0116] In some embodiments, the wire (W) may be configured as a double wire structure. The double wire structure can improve safety and reliability by arranging two strands of wire (W) in parallel along a single path. The two strands of wire (W) may start from the same fixed point or adjacent fixed point of the main body (1410) and reach the same connection or adjacent connection of the movable frame (1200) along the same pulley path. In the double wire structure, each wire (W) may be designed to bear half the weight of the measuring device (200), and even if one strand of wire (W) is cut, the remaining strand of wire (W) can support the movable frame (1200) to prevent a sudden drop.

[0117] Two strands of wire (W) can be connected to the first sensor independently of each other, and the control unit can monitor the status of each wire (W) individually. If a cut is detected in one strand of wire (W), the control unit can generate an alarm and restrict the operation of the drive unit (1300) to control the moving frame (1200) to move to a safe position.

[0118] In some embodiments, the two strands of the double wire structure may be made of different materials. For example, one may be made of steel wire and the other of synthetic fiber wire to have different failure mechanisms, which can reduce the possibility of simultaneous failure due to the same cause.

[0119] In some embodiments, the medical stand (100) may include a wire length adjustment device capable of adjusting the length of the wire (W). The wire length adjustment device may be used to adjust the tension of the wire (W) or to correct the sagging of the wire (W). The wire length adjustment device may be installed at one end or the other end of the wire (W) and may consist of a turnbuckle, a tensioner, or a reel device. The wire length adjustment device may be used to optimize the tension of the wire (W) during the initial installation of the medical stand (100) and to correct the elongation of the wire (W) due to long-term use.

[0120] In some embodiments, the wire length adjustment device may be connected to a control unit and automatically controlled. The control unit receives tension information of the wire (W) from a first sensor, and if the tension exceeds a preset range, it can operate the wire length adjustment mechanism to automatically adjust the tension. Through the wire length adjustment mechanism, maintenance of the medical stand (100) can be simplified and the lifespan of the wire (W) can be extended.

[0121] The medical stand (100) may further include a first sensor for determining whether the wire (W) is cut. For example, the first sensor may be configured to determine whether the wire (W) is cut and may be configured as a conduction sensor that detects the electrical continuity of the wire (W). The conduction sensor may apply a microcurrent to the wire (W) and monitor whether current flows through the wire (W).

[0122] When the wire (W) is in a normal state, current can flow continuously through the wire (W), and the conduction sensor can detect this and output a normal signal. When the wire (W) is cut, the electrical circuit is disconnected and the flow of current is cut off, so the conduction sensor can immediately detect the cut of the wire (W) and transmit an abnormal signal to the control unit.

[0123] In some embodiments, the wire (W) may be made of a conductive material or have a conductive coating applied. If the wire (W) is a steel wire, it is conductive in itself and can be connected to a conduction sensor without separate processing. The conduction sensor can be connected to one end and the other end of the wire (W) respectively to form an electrical circuit through the wire (W), and can immediately detect if a cut occurs at any part of the wire (W).

[0124] The current applied by the conduction sensor can be set to a very minute level to ensure safety and may not cause electrical danger to the user or patient. In some embodiments, the conduction sensor may use a microcurrent of a few milliamperes (mA) or less, which may meet the safety standards of medical devices.

[0125] In another embodiment, the first sensor may be configured as a vibration sensor that detects vibrations of the wire (W). The vibration sensor may be installed adjacent to a specific location on the wire (W) or directly attached to the wire (W) to detect vibration patterns of the wire (W).

[0126] When the wire (W) is operating normally, it may exhibit a constant vibration pattern depending on the restoring force of the gas cylinder (1400) and the movement of the moving frame (1200). When the wire (W) is cut, the tension of the wire (W) is rapidly lost, causing the vibration pattern to change rapidly or the vibration to disappear. The vibration sensor can detect these changes in the vibration pattern in real time to determine whether the wire (W) is cut, and if an abnormal vibration pattern is detected, it can transmit an abnormal signal to the control unit. The vibration sensor may be composed of an accelerometer, a piezoelectric sensor, or a MEMS sensor, and may be installed in the internal space of the fixed frame (1100) or along the path of the wire (W).

[0127] The value measured by the first sensor can be transmitted to the control unit described later. The control unit analyzes the measurement value received from the first sensor to determine whether the wire (W) is cut, and if it is determined that the wire (W) is cut, it can immediately stop the operation of the drive unit (1300). This prevents the sudden drop or rise of the moving frame (1200) and prevents safety accidents.

[0128] In some embodiments, multiple first sensors may be installed. For example, if the wire (W) consists of two strands, a first sensor may be installed on each wire (W) to independently monitor the condition of each wire (W). Additionally, for a single wire (W), multiple first sensors may be installed at different locations or different detection methods (conduction sensors and vibration sensors) may be combined to more accurately detect the cutting of the wire (W).

[0129] The medical stand (100) may further include a control unit that controls the operation of the gas cylinder (1400) and the operation of the drive unit (1300). The control unit may be an electronic control unit including a microprocessor, memory, an input / output interface, and a drive circuit, and may be installed at the bottom of the fixed frame (1100) or in a separate control box.

[0130] The control unit can control the motor of the drive unit (1300) to adjust the lifting speed, direction, and position of the moving frame (1200). The control unit can control the rotation direction and speed of the motor according to commands received from the user, and can detect the current position of the moving frame (1200) and move it precisely to a target position. A position sensor may be connected to the control unit, and the position sensor may be an encoder, a limit switch, or a distance sensor.

[0131] In some embodiments, when the drive unit (1300) is operated, the control unit may be configured to operate the gas cylinder (1400) so that tension is applied to the wire (W). Specifically, the control unit may control the piston (1420) of the gas cylinder (1400) to extend appropriately to maintain tension in the wire (W) when the drive unit (1300) raises the moving frame (1200).

[0132] In some embodiments, the gas cylinder (1400) may include an electrically controllable gas pressure regulating valve, and the control unit may control the valve to adjust the restoring force of the gas cylinder (1400) in real time.

[0133] The control unit may consider the state of the gas cylinder (1400) when determining the operating time, speed, and direction of the drive unit (1300). For example, when lowering the moving frame (1200), the control unit may reduce the output of the drive unit (1300) or apply a braking force by considering that the restoring force of the gas cylinder (1400) increases.

[0134] As the moving frame (1200) descends, the piston (1420) contracts and the restoring force of the gas cylinder (1400) increases, so this increased restoring force supports the moving frame (1200), thereby reducing the burden on the driving unit (1300).

[0135] Conversely, when raising the moving frame (1200), the control unit can increase the output of the drive unit (1300) by taking into account that the restoring force of the gas cylinder (1400) is reduced. As the moving frame (1200) rises, the piston (1420) extends and the restoring force of the gas cylinder (1400) decreases, so the drive unit (1300) must generate more force to raise the moving frame (1200) smoothly.

[0136] The control unit can continuously monitor the status information of the wire (W) received from the first sensor. When the first sensor detects a cut in the wire (W), the control unit can immediately stop the operation of the drive unit (1300) and generate an alarm. The alarm may be a visual alarm (LED flashing), an auditory alarm (buzzer sound), or a message display through a user interface. When a cut in the wire (W) is detected, the control unit can apply braking force to the reduction gear of the drive unit (1300) to fix the position of the movable frame (1200), thereby preventing the movable frame (1200) from falling rapidly.

[0137] In some embodiments, the control unit may be connected to a second sensor capable of detecting whether the circulation member (C) is disconnected. The second sensor can determine whether the circulation member (C) is disconnected by detecting the tension, position, or vibration of the circulation member (C). When the control unit receives a signal of disconnection of the circulation member (C) from the second sensor, it may stop the operation of the drive unit (1300) and generate an alarm. Even if the circulation member (C) is disconnected, the gas cylinder (1400) and the wire (W) can still operate to support the movable frame (1200), thereby preventing a sudden drop or rise.

[0138] The safety of the medical stand (100) can be significantly improved through the double support structure of the circulation member (C) and the wire (W). The circulation member (C) primarily performs the role of transmitting driving force, while the wire (W) and the gas cylinder (1400) perform the role of balancing the weight of the movable frame (1200). Even if the circulation member (C) is disconnected, the restoring force of the gas cylinder (1400) continues to support the movable frame (1200) through the wire (W), thus preventing the movable frame (1200) from rapidly falling due to its own weight. Conversely, even if the wire (W) is cut, the circulation member (C) can maintain the position of the movable frame (1200), and the movable frame (1200) can be fixed by the reverse driving prevention function of the reduction gear of the drive unit (1300). Through this dual safety device, the medical stand (100) can maintain safety even in the event of a single component failure, and can protect the safety of the expensive measuring device (200) and the patient.

[0139] The control unit is connected to a user interface to receive commands from the user and display the status of the system. The user interface may be a button, a touchscreen, or a remote controller, through which the user can input commands to raise, lower, or stop the moving frame (1200). Information such as the current position of the moving frame (1200), the tension of the wire (W), and the status of the gas cylinder (1400) may be displayed on the user interface.

[0140] The control unit can store multiple target positions of the moving frame (1200) in memory, and can control the moving frame (1200) to automatically move to the corresponding position when the user selects a preset position. For example, a chest imaging position, an abdominal imaging position, a lower limb imaging position, etc., can be stored in memory, and the moving frame (1200) can automatically move to the corresponding position by pressing just one button. This automatic position movement function can significantly improve work efficiency in a medical setting.

[0141] Although preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above. Various modifications are possible by those skilled in the art without departing from the essence of the invention as claimed in the patent claims, and such modifications should not be understood individually from the technical spirit or perspective of the present invention. Explanation of the symbols

[0142] 10: Medical device 100: Medical stand 200: Measuring device 1100: Fixed frame 1200: Moving frame 1300: Drive unit 1310: Lower rotating wheel 1320: Upper rotating wheel C: Circulation Member 1400: Gas Cylinder 1410: Main body 1420: Piston 1500: Multiple pulleys 1510: First pulley 1520: 2nd pulley 1530: 3rd pulley W: Wire

Claims

Claim 1 A medical stand comprising: a fixed frame; a movable frame attached to the fixed frame so as to be movable in a vertical direction; a driving unit installed inside the fixed frame and located at the lower part of the fixed frame; a circulation member connected to the driving unit and configured to apply the driving force of the driving unit to the movable frame; a gas cylinder installed inside the fixed frame and located at the upper part of the fixed frame; a wire connecting the gas cylinder and the movable frame; a plurality of pulleys located inside the fixed frame and changing the path of the wire; a control unit controlling the operation of the gas cylinder and the operation of the driving unit; and a first sensor configured to determine whether the wire is cut; wherein, when the driving unit operates, the control unit is configured to operate the gas cylinder so that tension is applied to the wire and is configured to transmit a value measured by the first sensor to the control unit. Claim 2 A medical stand according to claim 1, wherein the plurality of pulleys comprises a first pulley attached to the fixed frame, a second pulley attached to the main body of the gas cylinder, and a third pulley attached to the piston of the gas cylinder. Claim 3 A medical stand according to claim 2, wherein one end of the wire is connected to the main body of the gas cylinder and the other end of the wire is connected to the movable frame. Claim 4 A medical stand according to claim 3, wherein the wire is connected to the movable frame by sequentially passing through the third pulley, the second pulley, the third pulley, and the first pulley from the main body of the gas cylinder. Claim 5 delete Claim 6 delete Claim 7 A medical stand according to claim 1, wherein the circulation member comprises a stepless rail configured to rotate by the operation of the driving unit and a connecting structure attached to the stepless rail and moving according to the rotation of the stepless rail, and the connecting structure of the circulation member is attached to the moving frame. Claim 8 A fixed frame comprising an upper wall, a lower wall, and a side wall adjacent to the upper and lower walls; a movable frame attached to the side wall of the fixed frame so as to be movable in a vertical direction; a driving unit installed inside the fixed frame and located on the lower wall of the frame; a circulating member connected to a rotating wheel connected to the driving unit and the upper wall of the fixed frame, configured to rotate according to the operation of the driving unit; a gas cylinder installed inside the fixed frame and comprising a main body fixed to the upper wall of the fixed frame and a piston configured to protrude from the main body toward the lower wall of the frame; a first pulley and a second pulley attached inside the fixed frame with a fixed height in a vertical direction; a third pulley attached to the piston of the gas cylinder and moving together with the piston of the gas cylinder; and a wire connected to the movable frame by sequentially passing through the third pulley, the second pulley, the third pulley, and the first pulley from the main body of the gas cylinder; and a control unit for controlling the operation of the gas cylinder and the operation of the driving unit. A medical stand comprising: a first sensor configured to determine whether the wire is cut; wherein, when the driving unit is operated, the control unit is configured to operate the gas cylinder so that tension is applied to the wire, and the value measured by the first sensor is transmitted to the control unit.

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